Cross-platform file path building and representation

Question

I am in a refactoring stage for a project I am working on and would like to make some improvements to how I build and represent file system paths. What things should I take into consideration when representing relative paths in Java code to ensure compatibility on Ubuntu, OSX, and Windows 7.

Currently to get an instance of File referencing "MyProject/foo/bar.f" I would have code along the lines of:

File bar = new File(ProjectDirectory + "/" + FooResourceDirectory + "/" + barName);

This seems wrong for several reasons, what are some of the best practices?

Answer 1

Perhaps use the constructors provided to do this sort of thing:

new File(parent, child)

You have to "nest" them, but it's trivial to handle this (eg make a function to get a path built from something taking string... .)

See the File constructors.

Answer 2

首先，您应该使用File.separator File.pathSeparator 而不是“/”。